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NARA [144]
3 years ago
6

What is the speed of a softball that travels 20 m in 2 sec?

Chemistry
2 answers:
sladkih [1.3K]3 years ago
7 0
The ball travels 10m/s

Speed = distance/time
Oxana [17]3 years ago
7 0

Answer:

average speed-3.5 m/s

Explanation:

speed=distance/time

speed of object in 2nd interval = 20/10=2 m/s

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A baseball player hits a ball. Which is the best description of the energy of the ball as it flies over the pitcher’s head?
Elan Coil [88]

The right option is; b. mechanical

Mechanical energy is the best description of the energy of the ball as it flies over the pitcher’s head.

Mechanical energy is the energy that an object acquires due to its position or due to its motion. From the question, the baseball player has chemical potential energy (stored as food) which is transformed into work. As the baseball player hits the ball, there is energy exchange in which the ball acquires energy to perform its work. The energy obtained by the ball upon which work is done is called mechanical energy.


3 0
3 years ago
Read 2 more answers
Find the normality of 0.321 g sodium carbonate in a 250 mL solution.
Radda [10]

Answer:

the normality of the given solution is 0.0755 N

Explanation:

The computation of the normality of the given solution is shown below:

Here we have to realize the two sodiums ions per carbonate ion i.e.

N = 0.321g Na_2CO_3 × (1mol ÷ 105.99g)×(2eq ÷ 1mol)

= 0.1886eq ÷ 0.2500L

= 0.0755 N

Hence, the normality of the given solution is 0.0755 N

5 0
2 years ago
If gas is truly to be classified as a form of matter this means it can be measured. What form of gas can be measured?
juin [17]

Answer:

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3 0
2 years ago
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On the Periodic Table, which elements are predominantly (mostly) gases with low densities?
aliya0001 [1]
I’m sorry if I wasted your time but I think it’s alkali metals but I’m
Not sure
5 0
2 years ago
Why do non metallic elements pull electrons from metallic elements so effectively during a reaction?
Slav-nsk [51]
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8 0
3 years ago
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